Elecsys NT-ProBNP and BNP assays: are there analytically and clinically relevant differences?

Area of Science:

• Cardiology
• Biomarker Analysis
• Clinical Chemistry

Background:

• B-type natriuretic peptide (BNP) and NT-proBNP are established cardiac biomarkers.
• They are used for assessing left ventricular dysfunction, congestive heart failure, and risk stratification in acute coronary syndrome.
• Significant analytical differences exist between various automated immunoassays for BNP and NT-proBNP.

Purpose of the Study:

• To review recently published methods and results concerning BNP and NT-proBNP immunoassays.
• To evaluate the clinical significance of analytical differences between BNP and NT-proBNP assays.

Main Methods:

• Review of recently published methods and results.
• Comparison of analytical and pre-analytical differences between Triage BNP and Elecsys NT-proBNP assays and other BNP methods.

Main Results:

• Significant pre-analytical and analytical differences exist between Triage BNP, Elecsys NT-proBNP, and other BNP methods.
• These differences do not lead to clinically significant variations in diagnostic and prognostic applications for systolic heart failure and acute coronary syndrome risk stratification.

Conclusions:

• Despite analytical variations, BNP and NT-proBNP assays demonstrate comparable clinical utility in diagnosing heart failure and risk stratification.
• NT-proBNP may offer an advantage in detecting mild or asymptomatic heart disease.